车-车通信与车-地通信信号系统方案可靠性分析对比

Reliability Analysis and Comparison of Signaling System Schemes of Train Autonomous Circumambulate System and Communications Based Train Control System

目前轨道交通信号系统主要基于车-地通信的信号系统,而基于车-车通信的信号系统也已经在国内开始逐步投入运营。为比较两种信号系统的可靠性水平,从故障导致运行延误的角度开展车-车通信与车-地通信信号系统方案的可靠性分析,结合车-车通信与车-地通信信号系统的设计架构与线路配置分别绘制故障导致2 min以上延误、故障导致5 min以上延误的系统可靠性框图,评价与比较两种系统架构下的可靠性水平,并提出改善措施,为轨道交通信号系统的发展与应用提供参考。

At present,the communication based train control system(CBTC)has been used as the mainstream signaling system for rail transit,while the train autonomous circumambulate system(TACS)has also been gradually put into operation in China.To compare the reliability level of these two signaling systems,this paper performs a reliability analysis for both the TACS system and the CBTC system from the perspective of fault-caused operation delay.It presents the reliability block diagrams of both the TACS and the CBTC system in which faults lead to delays of more than 2 minutes and more than 5 minutes,which are drawn in view of the design architecture of these two signaling systems and the line confi guration.Then,it provides an evaluation and comparison of the reliability level under the two system architectures under discussion.Moreover,it proposes improvement measures,which are intended to provide reference for the development and application of the signaling systems for urban rail transit.